I've got four of these powerful Ametek 114787 3 stage vacuum motors that I am never going to use. I know they are powerful because we used them to move plastic pellets over 2500 feet thru a 2" tube before the place shut down. I saved these to build a bench but I don't think that's gonna happen....

The above is from an advert in 2012 for these four killer motors. I am now moving. These are much too precious to garbage. Someone make me an offer. These are serious vacuum motors!